Electrical conductor cable



Sept. 26, 1933. H. M. SCOTT ELECTRICAL CONDUCTOR CABLE Filed March 24, 1932 HENRY M. SCOTT, 3% WW Patented Sept 26, 1933 ELECTRICAL CONDUCTOR CABLE Henry M. Scott, Washington, D. C.

Application March 24, 1932.

8 Claims.

My invention relates to electrical conductors, and hasparticular reference to a flexible electrical conductor cable designed for the transmission of electrical power by means of very high voltage.

' An important object of my invention is to provide an electrical-conductor cable so constructed that corona effect is greatly reduced.

A further object of the invention is to pro- 19 vide an improved flexible electrical conductor cable which is strong and relatively light.

A further object of the invention is to provide an electrical conductor cable which has a substantially uniform diameter throughout its length;

A further object of the invention is to provide an electrical conductor cable which is tubular throughoutsubstantially its entire length to provide for proper air circulation within the same, Q therebyreducing the; loss of power through the over-heating of the cable.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of an electrical conductor cable embodying my invention, parts being brokenaway for the purpose of illustration,

Figure 2 is a transverse section taken on line 2-2 of Figure 1,

Figure 3 is a transverse section taken on line 33 of Figure 1',

Figure 4 is a longitudinal section through the core, taken on line 44 of Figure 3,

Figure 5 is a perspective view of one of the core elements,

Figure 6 is an end elevaton of a modified form of core element, V

Figure 7 isa side elevation of a modified form of core, and a Figure 8 is a transverse section taken on line 8-8 of Figure 7.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 desigates a core,

'5 as a whole, having a proper exterior diameter,

- so that the finished cable will be hollow and have a proper diameter to greatly reduce corona effeet. This core is flexible and may be wound upon a drum. This core embodies preferably equi-distantly spaced hollow core elements or Serial .No. 600,988

tubes 11, preferably formed of metal, such steel, copper, brass, aluminum, or the like. When the core cleaner formed of steel they preferably copper or zinc coated. These core elements are suitably stiff to prevent collapsing of the cabie. Each core element is cylindrical, and preferably has both ends open, providing 2. cable which is tubular throughout substantially its entire length. Each core element is provided upon its periphery with a plurality of longitudh 5 nally extending pockets or depressions 12, and these depressions are preferably diametrically oppositely arranged. While I have shown two of these depressions upon each core element, the invention is in no sense restricted to this nuinher, as they may be increased or decreased. I have found that satisfactory results may be obtained by providing the core element with only one depression 12, as shown in Figure 6.

As shown in Figures 1 to 5, inclusive, longitudinal strands or wires 13 are arranged within the depressions 12. These wires may be made of steel, copper, aluminum, or other suitable metal. When the wires are made of steel, they are preferably coated with copper or zinc. Particular attention is called to the fact that the peripheries of the longitudinal strands or wires 13 are substantially fiush with the peripheries of the core elements, whereby the core, as a unit, has substantially a uniform diameter throughout its entire length. This is important, as the finished cable will, therefore, have a substantially uniform diameter throughout its entire length. The core elements 11 and the strands 13 will ordinarily be formed of the same metal, and the strands are rigidly attached to the core elements within the recesses 12 by welding, or the like. The invention is not restricted to this method of attachment, as the attachment may be effected by frictional engagement, as by suitably compressing the core elements about the strands when they are inserted within the recesses or pockets.

The cable further embodies layer or layers of strands or wires 14, which may be formed of copper, aluminum, steel, or other suitable metal. These strands or wires are cabled or spirally bent about the core 10. If desired, additional layer or layers of strands or wires 15, formed of copper, aluminum, steel, or other suitable metal, are cabled about the strands 14.

In Figure 7, I have shown a further modification of the invention. In this figure, the core is shown as embodying spaced cylindrical core elements 11, which are identical with the core elements 11, except that the pockets or depressions 12 are omitted. When this type of core element is employed, the longitudinal strand or strands 13 are disposed inwardly of'the core elements and are attached to the peripheries of the same by welding, or the like.

The cable which I have thus produced will be found to be strong and light. It will have a large diameter compared to the cross-sectional area of the cabled strands or wires, whereby corona effects are greatly reduced.

The cable is tubular throughout substantially its entire length, thereby affording proper circulation of air interiorly of the same, preventing reducing heat losses. The core of the cable is so constructed that it may be produced cheaper than corresponding devices along this line.

While it is preferred to provide the core elements with the depression or depressions, yet the invention is not necessarily restricted to this feature.

It is to be understood that the form of my invention herewith shown and described is to be taken as the preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention, or the scope of the s'ubjoined claims.

Having fully described my invention, what I claim is:

1. An electrical conductor cable comprising a core including spaced tubular core elements, a longitudinal strand contacting with the periphcries of the core elements and positively attached thereto to prevent relative longitudinal movement between the core elements and longitudinal strand, and wires cabled upon the core.

2. An electrical conductor cable comprising a core including a plurality of spaced tubular core elements and a longitudinal strand welded to the peripheries of the core elements so that the core elements are held against relative longitudinal movement with relation to the strand, and wires cabled upon the core.

3. An electrical conductor cable comprising a core including tubular core elements, each core element having both ends open, a longitudinal strand attached to the peripheries of the tubular core elements, and wires cabled upon the core.

4. An electrical conductor cable comprising a core including a plurality of spaced hollow core elements, said core elements having depressions in their peripheries, a longitudinal strand arranged within the depressions, and wires cabled upon the core.

5. An electrical conductor cable comprising a core including spaced hollow core elements provided upon their peripheries with longitudinal depressions, a strand extending through the longitudinal depressions and held therein against relative longitudinal movement, and wires cabled upon the core.

6. An electrical conductor cable comprising a plurality of spaced hollow core elements, a longitudinal strand extending exteriorly of the core elements and positively attached to their peripheries, and wires cabled upon the core.

'7. An electrical conductor cable comprising a plurality of spaced hollow core elements, each core element being provided upon its periphery with a plurality of longitudinal depressions, longitudinal strands held within the depressions, and wires cabled upon the core.

8. An electrical conductor cable comprising a core including a plurality of spaced hollow core elements, said core elements being provided in their peripheries with longitudinally extending pockets, a longitudinal strand held within the pockets, and wires cabled upon the core elements.

HENRY M. SCOTT. 

